Hello Jürgen,

I know your existing box, I continued to work with it at first, but then threw it out because I “touched it roughly” during the last conversion and therefore scrapped it.

The transfer point (UP) is in my basement, where the Swisscom line comes directly into the house. From there we made the direct connection to the DSL socket. U72 should be ok, but we immediately put in a new unshielded network cable ([http://www.brack.ch/daetwyler-uninet-602-flex-132093](http://www.brack.ch/daetwyler-uninet -602-flex-132093)). It was important that there were no strands but rather solid copper wires because of the connection in the boxes. You only need 2 wires to supply the DSL socket, simply use a twisted pair of wires, they are easy to distinguish in color. For me it is also 9m long. I could now use the other three pairs of wires for internal analog telephony, but it’s not necessary at the moment.

Branches or additional screw connections/clamps in the line from the UP to the socket cause the most deterioration, they all have to be removed. In addition, an improvement can be achieved by simply “shooting” the copper wires into the terminal connection of the box (topic of oxidation).

In my case, re-installing the entire DSL supply line in the house ultimately didn’t bring about any significant improvement in the line values, but I had to get to work on the installation anyway because the DSL socket had to be in another room.

Things looked significantly different at the beginning of the year, as the pair of wires on the supply cable from the control center to the house was changed and possibly also the port in the control center. This resulted in an increase in the capacity of the line by around 30%.

About the measurement phase: no, I’m not sure 😉

Greetings, Thomas

Hello Jürgen,

I would recommend you get a 1×2×0.5 U72M cable. The cable is shielded, on the UP you connect the ground wire from the cable to the ground of the UP. I wouldn’t use an Ethernet cable because the remaining unused wires could act as an antenna. If you need a BBR socket and cable, I can bring them to your next meeting.

Greetings Ralph

The other wires don’t bother you. Otherwise there could be problems on the supply line as there are tons of unused wires in it.

PS: The measured values ​​are a bit too low at 9.8dB.

Hi Jürgen,

I would definitely replace the old cable (twin wire). If you have access to the cable Ralph suggested, I would use that too. Just don’t forget to ground the shielding 😉

@XT, that’s what I thought, but I’m not a trained electrician, and the network cable I used works perfectly (it was even approved by a Swisscom technician, measured and found to be “great”) 😉

Greetings, Thomas

@ XT if there are problems, then you can also use another four. Ethernet cables have different attenuation values, reactances, capacitances and inductance (X,Z,L) than a telephone cable.

I’ve had to remove an Ethernet cable as a supply cable once, but it only caused problems.

A U72 is also cheaper in price.

@POGO 1104

But these values ​​are still with the old pair of wires? I would almost bet that these values ​​will be better with a newly inserted and cleanly connected cable.

Greetings, Thomas

Hello Jürgen,

BBR socket without feedback

Doesn’t matter, it’s cheaper than an RJ45 socket. SC sells it for 26.50 CHF, Groshaldel sells it even cheaper. The flat cable (similar to speaker wire is I52 cable) the second cable is perhaps a reserve cable for 2. Anschluss or apartment.

@ aki and you then clip the 0.8 onto a VS 83 distributor, have fun with it. If I catch you with that, I’ll give you one on the 12th. This will destroy any VS83 terminals (that’s crazy!!!!).

U72 1×2×0.5 is available from Kablan. G51 is ok, not the first choice, only in an emergency.

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@user109 wrote:

@ XT if there are problems, then you can use another four.

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But not because a free wire is annoying.

I’ve never had any problems using network cables as telephone cables.

But I also prefer u72, since the T+T terminals (specifically VS83) are designed for wires and not for stranded wire.

I agree with you. If I catch an electrician with 0.8 wires on a VS83 distribution, he will never do this again!!

Maybe you can unscrew the socket and take a photo.

@Pogo1104:

What exactly is installed in the house connection?

Pipe length approx.?

Are there other telephone cables or even wires in the pipe?

Don’t take a U72 like others recommended above. With VDSL always U72M.

External interference is just as bandwidth limiting as length and crosstalk DSL/DSL. Unless you want to save money, then it’s better to do it at home. You won’t gain any db here unless totally oxidized.

Simply because it hasn’t been mentioned yet:
From an electrical point of view, an ISDN installation is a digital socket.

Go from U (if you are not yet on All-IP! via VDSL splitter to the router), to All-IP directly to the router. Then you’ve left out everything that could possibly cause problems in your apartment.

The U72 has no umbrella.
M=umbrella
It is not possible to determine whether it is only with foil or also with braid.

You almost won’t find 1×2. It’s not necessary either. 1×4 are a dime a dozen.

Before you invest too much time, I recommend taking more precise measurements.